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package org.glassfish.grizzly.portunif.finders;

import java.util.logging.Level;

import java.util.logging.Logger;
import javax.net.ssl.SSLException;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.Grizzly;
import org.glassfish.grizzly.filterchain.FilterChainContext;
import org.glassfish.grizzly.portunif.PUContext;
import org.glassfish.grizzly.portunif.ProtocolFinder;
import org.glassfish.grizzly.ssl.SSLEngineConfigurator;
import static org.glassfish.grizzly.ssl.SSLUtils.*;

/**
 *
 * @author Alexey Stashok
 */
public class SSLProtocolFinder implements ProtocolFinder {

    private static final Logger LOGGER = Grizzly.logger(SSLProtocolFinder.class);

    private final SSLEngineConfigurator sslEngineConfigurator;

    public SSLProtocolFinder(final SSLEngineConfigurator sslEngineConfigurator) {
        this.sslEngineConfigurator = sslEngineConfigurator;
    }

    @Override
    public Result find(final PUContext puContext, final FilterChainContext ctx) {
        final Buffer buffer = ctx.getMessage();
        try {
            final int expectedLength = getSSLPacketSize(buffer);
            if (expectedLength == -1
                    || buffer.remaining() < expectedLength) {
                return Result.NEED_MORE_DATA;
            }
        } catch (SSLException e) {
            LOGGER.log(Level.FINE, "Packet header is not SSL", e);
            return Result.NOT_FOUND;
        }

        return Result.FOUND;
    }
}
